Plural editing/copying conceptually not correct

Moved from http://drupal.org/node/281282:

"When editing plural strings, the edit buttons have what looks like buggy behavior. You have an edit field per variant, which is expected. But you also have an edit button per variant for the source or the existing translation/suggestion, which I am not sure is great. If you have a language with three variants, you need to click through all three variants' copy buttons to copy them to the edit fields, to avoid submitting empty values there. I'd suggest copy all-or-none buttons, as it is with suggestions for plurals but not with source or translation values now. It would be great to have this consistent."